fisher



glatten gratos getint ffice.

CHARLES* E. FISHER, 0E CHELSEA, MASSACHUSETTS'.

Y LettersPatent No- 80,539, dated August 4, 1868.

IMPROVEMENT IN REVERSILLE LATGHES. I

T ALL. PERSONS TO WHOM THESE PRESENTS SHALL COME: l' Y Beit known that ICHAnLEs It. Frsnnn, of Chelsea, in the county of Suiiolk, and State of Massachusetts, have invented a`newand useful Improvement in Spring-Looks-for Doors, &c.; and I do hereby. declare the same to be fully described in the following specification and represented in theaccompanying drawings'. Y

Figure 1 denotes a sideiliew, and

Figure 2 a front end view of the lockoase. v l

Figure 3 .is a; side elevation of the lock-casc-with one of its-plates removed, in order to exhibit theinterior Portion of thelock. v i

Figure 4 is a sido view of-the bolt, and A Figure 5 a side viewof the-furcated slider, which embraces the shank of the bolt, and'serves to maintain the head of the bolt (when once adjusted) in its normal position or path of movement.

-The object of my invention is to provide 'a simple-and eli'ective means whereby the bolt of the apparatus can be readily so'adjusted as to enable the look to be applied to, either a right or ""lefthand door, as circumstances may require. i

.In the said drawings, AA denotes the lockl-case, which isof alrectangnlarzshape, and constructed inthe ordinary manner.

B is the front plate thereof..

C isA the bolt, which is formed with a rectangular. bevelled head,a,^and a cylindrical shamlg-b, the latter terminating in an annular shoulder or'button, c, the whole-being as shown in fig. 3.

-The said shank passesthrough a hole made through a projection, ch-formed in a 'U-sliaped carriage, D, and

is' secured to thecarrage, in-manneras show-n in iig. 3.

Furthermore, the saidsliankis encompassed by ahelical spring,'e, one end of which rests against the head I a, and the other' end `against the said' projection-d. l 1 This spring e should he what is termed an easy spring," -,that is, its lcoils `should have an expansive force only a little greater than that required to return the bolt toits normal position after it may have been forced into its case. Were the spring a stiff` or strong one; too great `power wouldv belrequred to close the'door to which suchlook` was-applied. v

i E is another coiled spring, .which extends longitudinallyl of the case,"ndh'a`s one'ofits ends attached to a stud, g, projecting up from the lock-plate, and its other endaiiixed to a stud, h, extending up from the oarlringe I), as shown in the said tig. 3. The object of this spring is torestore the carriage to its normal position D,'as shown in iig. 3.

after the same has beenffor'ced backward bythe key oriknob-spindlezy E is the tumbler, which 'is ofa cylindrical form, and extends transversely through the two walls of the lock-oase. The said tumbler has a rectangular socket,f, made axially through it, vto receive either akey or a knob-spindle shank. The said tumbler has two arms, h extending from itlin opposite directions. The at faces of. the said arms rest against shouldersor projections, kk, extending up from the rear part ofthe carriage The carriage D slides between parallel guides] l, and is maintained Vin its proper position by means of projections or ears, m m. The extent of movement of the said carriagel should be equal to the distance that the head ofthe b olt projects beyond the f ace of the back plate. The stud o limits'its forward movement, and the rear part of the lock-case its backward movement. y

Byapplying-the ,hand of a person to the key or knob of revolving ordm-ning the same a short distance in eitherdirection, the head of the bolt may be drawnbac'kward into` the lock-case. -By releasing lthe hand tram the key or knob, the contractile force of the spring E will force thebolt forward to, its original position.,

In order to enable my lock to be readily `adjusted, so as `to1 lit either a right or left-hand door, I-a'pplly to the spindle going through the said tumbler, andl the roer end of the bolt-shank, and so as to strnddle it and rest against its button, c, a bifurcated slider or saddle, F, which is disposed within n. chamber, g, made in the carriage D, as shown in 5g. The said saddle F is so formed and applied to its inner chamber as to move freely up and down within the same, which it will Q., readily do when relieved from the-action of the spring e, and the lock is inverted. i t Another rmode'inwhich I have contemplated constructing the slider F is tofor'm the lower end thereof with aitenon, to enter a socket or hole made transversely through the shank of the bolt; but I do not consider this method as goed as that above mentioned. p I

If we suppose the lock to be fixed' so as toI constitute what is termed a right-hand" lock, and desire to change it. to atlefthand" lock, we have simply to press 'back (with the thumb or finger) the bolt ush with' the faceY of the front plate, B. The saddle or slidexF will then be relieved of the action of the spring, 'and by Yturning the case one hundred and eighty degrees, (or bottomside up,) the actionofgravity vwill cause the saddle to slide back in its chamber, and thus become entirely disconnected from the shank of the bolt, and allow the head of the bolt t o be withdrawn a short distance-from the case. lNext we revolve the bvolt dn' its shank one hundred and eighty degrees; next push the head of the bolt into the'eas'e, and flush with the face of the plate B; and next turn the lock-case back into its first position. The action of gravity will againforce back the l saddle into the position shown inflig. 8, and we have a lockadapted to fit a lefthand door.

Having described my imprqved lock, I would remark that I do not claim broadly so constructing a lock or 1atch-case that the bevelled' bolt or`iatchhead thereofcan be revolved or reversed, so as to adapt the lock to be used on either a right or lef "-hand door, as circumstances may require, as'I am aware that such is not new; but A v r What I claim therein as of my invention, is as follows 1. I claim the slider or saddle F, with-the reversible bolt C and its springe, when combined and arranged as described, and so, as to operate together as set forth.

2. I also claim the lcombination of the carriage D, the tumbler E', and the retractile spring E, with the saddle F, th'ereversible bolt C, and its spring e, the whole being arranged and applied to the case A, in manner as described, and so as to operate together as set forth;` l 'A -CHARLES R. FISHER.

Witnesses z WM. JONES, THOMAS COLE. 

